Editing Cam and compression ratio compatibility (section)
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===Compression calculators=== {{Note1}} Different calculators use different ways of expressing piston dome or dish volumes. Some calculators assign a negative number for a dish or dome, others will use a positive number. The same thing goes for advertised figures published by different manufacturers when they describe piston dish or dome volumes. So be sure of the sign (negative or positive) that is needed to get the correct results from the calculators. ====Static compression ratio calculator==== *[http://www.wheelspin.net/calc/calc2.html Wheelspin.net] ====Dynamic compression ratio calculators==== *[http://www.empirenet.com/pkelley2/DynamicCR.html Dynamic compression calculator] by Kelly *[http://www.uempistons.com/calc.php?action=comp2 Dynamic compression calculator] by KB *[http://www.wallaceracing.com/dynamic-cr.php Wallace Racing DCR calculator] {{Note1}} Some dynamic compression ratio calculators (like KBs) ask for an additional 15 degrees of duration be added to the IVC @ 0.050" lift point nnbfigure. This works OK on older, slower ramped cam lobes, but the faster lobe profiles may need to have 25 degrees or more added to be accurate.
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